Abstract
In order to make the power assist suit into practical use, the movable range of arm and the rotational range of the spine must be extended. In this study, the space between the unit and the wearer's shoulder was extended and the spine of the back unit was setback from the shoulder unit, so that the movable range of arm and the rotational range of the spine were extended. By introducing a parallel link mechanism as the elbow joint of the arm unit, and by storing airbags more compact, new compact and powerful arm unit was realized. The number of the joints constructing the shoulder unit was decreased and the configuration of the joints of the arm unit was improved in fitting with the wearers arm.
